Window latch



F. A. PALMER WINDOW LATCH Filed April 22, 1920.

[N VE/V T OR I II/07m) w x 2&5

FIG. 4--

April- 1, 1924.

III. E

i, on new rnnnssmvan'm.

WENDOW Application filed Esprit 22,

To all whom it may concern:

Be it known that l, FPANELH-T A. PAL- MER, a citizen or" the UnitedStates, residing Erie, in the county of Erie and State of Pennsylvania,have invented new useful improvements in Vfindow Latch, of whichthe'iollowing is e specification.

The purpose of this invention is to pro vide e Window latch wh'ch may bereadily applied. to the common sliding windows and afford an eficientlock which will operate at any point in the w'" dew and prevent a.further opening of ei or the upper or lower sash.

In carrying out the invention it is desirsble to have the latch soformed that it cannot be disengaged from the outside in other words, maybe firmly locked. against any tampering from without the window.Features of the invention relating to details will appear more fullyfrom the specification and claims.

The invention is illustrated in the accompanying drawings as follows:

Fig. 1 shows a. plan view 0:3 the device 1 the top of the frame removed.

2. bottom view of the device.

43: c section on the line in Fig. 2. marks the lower sash of a window, 2the u, er sash, 3 the side walls of an enclosing frame, 4 a connectingtop and rear web, and 5 2. bottom web completing the frame. Qhe frame asit will be obser ed forms 2. pocket open at the front.

An sttaching plate 6 is provided with e slot 7 extendin ecross the upperface and is secured to the frame 3 by means of screws 8. The plate hasflanges 63* and 6 and a screw 6 extends through the flange 6 by means ofwhich it may be clamped to the top edge of :1. window sash. The slot 7permits oi the being moved along the plate 6 so as to adjust the framerelatively to the fro face of the upper sash so that the lock. g devicesmay work properly with relation to such sash.

A locking dog 9 is mounted in the frame by means of 2% pin 10 whichextends across from one wall '3 to the other. 'lhe dog is provided witha rubber face 11 which is set in 2. socket 9 in the dog 9 and secured inplace therein in any desirable manner preferably by pins 12. It willreadily be seen that as this dog swings downwardly it protrudes from theistame and brought 2 9 section on the line Qr-2 in Fig. i.

isso. Serial No. 37.5317.

into engagement with the upper sash will prevent upward movement of thelower sash or a downward movement of the upper cash because of suchrelative movement to increase the protrusion and consetly will soseparate the sashes and force in against their stops as to prevent anymovement.

order to lock the dog 9 so that it not be forced pwerdly andconsequently engaged by n thin instrument from the outside I provide adog 14. This dog is pivotally mounted on s pin 15 which extends'froinone well 3 to the other. The dog has the serrations 16 on its face whichengage a serretion 17 on the dog 9 so as to maize the engagement betweenthe dog 14 and the dog 9more secure so as to prevent a. retraction ofthe dog 9 by pressureon log 9. A spring 18 is coiled around the 1 ndengages the dog 14: and the wall ends to thrust the dog 14 down- *dlyinto engagement. A spring 13 is ound the pin 10 and operates against thedog 9 and the bottom 5 and tends to retract the dog 9.

The pin 15 is fixed on the dog 14: and extends to without the Wall 3 andis provided with o. nurled handle 19 by means of which the dog 14 may beretracted when it is desired to release the dog 9. By retracting the dog14. against the spring 18 the spring 13 is permitted to accomplish theretraction of the dog 9. If the dog 9 tends to stick in engagement aslight movement of the sash will release it.

In order to lock the dog 14 in retracted oosition I provide a pin 20 onthe handle vices lockin the dog in its upper o-r'1'e tracted position.The dog 14: is of slightly less width than the frame so as to permitaxial movement of the pin 15 sufiicient to carry the pin into and out ofthe perforation Q1.

What ll claim as new is 1. In it window latch, the combination of aframe; a latching dog pivotelly mounted and housed in the frame andprotruding therefrom, the protrusion being increased by the swinging ofthe dog and adapted to engage a plane surface; a setting dog op eratingon the latching dog to move it to and secure it inlocking position atvarious points extending to the point of greatest protrusion; a handlefor the setting dog extending to Without the frame; a spring retractingthe latching dog; and a spring acting on the setting dog and tending toforce it into engagement With the locking dog.

2. In a Window latch, the combination of a frame; a latching dogpivotally mounted and housed in the frame and protruding therefrom, theprotrusion being increased by the swinging of the dog; a setting dogoperating on the latching dog to secure it in latching position at thepoint of greatest protrusion; a handle for the setting dog extending toWithout the frame; a spring retracting the latching dog; and a springacting on the setting dog and tending to force it into engagement Withthe latching dog, the spring on the setting dog being of greaterstrength than the spring on the latching dog.

3. In a Window latch, the combination of a frame; a latching dogpivotally mounted and housed in the frame and protruding therefrom, theprotrusion being increased by the swingingof the dog and adapted toengage a plane surface; a setting dog operating 0n the latching dog tosecure it in latching position at various points extending to the pointof greatest protrusion; a handle for the setting dog extending toWithout the neeepoe frame; a spring retracting the latchin dog; andmeans for securing the setting 0g in retracted position.

a. In a Window latch, the combination of a frame in the form of ahousing; a latching dog pivotally mounted in the frame and housedthereby and protruding therefrom as it is swung., the protrusion beingincreased by the swinging of the dog; a spring tending to retract thelatching dog; a setting dog mounted in the frame and acting on thelatching dog; a spring acting on the setting dog, said spring being ofgreater strength than the spring on the latching dog; a pin on which thesetting dog is mounted extending Without the frame; said dog being movedby turning movement of the pin; a handle on the pin; and latching meansbetween the handle and frame for latching the setting dog in retractedposition.

5. In a Window latch, the combination of a frame; a latching devicecarried by the frame, the latching device having a protruding swingingmeans, said protuberance increasing as the means swings and adapted toengage an adjacent plane surface; a clamp for securing the frame on theedge of a Window sash; and means for adjusting the frame on the clamp.

In testimony whereof I have hereunto set my hand.

FRANKLIN A. PALMER.

